- Add a main entry point for the jasmine-core npm

- jasmine-core can now self test with the jasmine-npm
- Add node examples files
- Add node_boot.js for node environment
- Move jasmine-core npm packaging to .npmignore
- removing src_dir and src_files from jasmine.json b/c jasmine-npm does not support requiring source files automatically.

.npmignore

@@ -0,0 +1,23 @@
+dist/
+grunt/
+images/
+node_modules
+release_notes/
+spec/
+src/
+Gemfile
+Gemfile.lock
+Rakefile
+jasmine-core.gemspec
+.rspec
+.travis.yml
+.jshintrc
+.gitignore
+*.sh
+Gruntfile.js
+lib/jasmine-core/boot/
+lib/jasmine-core/boot.js
+lib/jasmine-core/spec
+lib/jasmine-core/*.css
+lib/jasmine-core/jasmine-html.js
+lib/jasmine-core/version.rb